After a slower year in 2013, world wind installations will bounce back in 2014, perhaps to a new record—the Global Wind Energy Council sees the potential for 47,000 megawatts. Roughly half of the total will be built in China and the United States.

I know that many of you can't get enough of Elon Musk, one of the rare entrepreneurs who is tackling big problems in difficult industries because he thinks they're going to make the biggest difference to the future of humanity.

Medium and heavy-duty vehicle represent about 7% of the vehicles on American roads, but because they are a lot more thirsty for fuel than light passenger vehicles, but they account for over 25% of fuel consumption in the country.